Starting as a project to redesign the Citroen 2CV, the design was given to the newly acquired Panhard design team under the leadership of Louis Bionier. Citroen's own Jacques Charreton altered the design of the 'Projet AY' somewhat. Named 'Dyane', possibly as a reference to the Panhard Dyna and Dynamic models, or maybe a reference to a Goddess ('DS' is a pun on 'Deesse' - the word for Goddess), the Citroen Dyane was launched at the 1967 Paris Salon. The chassis and power unit engineering were strongly based on the 2CV, including the 425cc air-cooled flat twin engine. The Dyane did get a 4-speed gearbox, and a rear hatch, and more comfort. The Dyane 6 was launched in January 1968 gaining the 602cc engine from the Ami 6, and in March 1968 the base model was given a 435cc engine and sometimes was called 'Dyane 4'. The Dyane 6 engine was upgraded to 33bhp in September 1968, and 35bhp in February 1970. At the same time a window was fitted into the c-pillar. The grille and trim were revised in 1974, and Dyane sales peaked at 126,850 for the year. In August 1975 new owners Peugeot culled the Dyane 4, and in 1978 the van version of the Dyane, named 'Acadiane' was launched, and inboard disc brakes from the Ami 8 were given to the Dyane 6. Production ended at Levallois in 1982 but continued in Spain and Portugal. Production ended in 1983. The Acadiane van was produced only in Vigo Spain and continued until 1987.